the EZ - TCU does all the work for you The EZ - TCU is fully configured and ready to run right out of the box no tuning necessary. But for those who demand customization, the unit is also optionally fully programmable based on load, speed and RPM. The EZ - TCU programming interface is completely intuitive. There is no real expertise needed if you want to custom program your calibration. The EZ - TCU is capable of real - time switchable calibrations, which allows for multiple setups. Run one calibration on the way to the track, and then, with the push of a button, have a more aggressive setup ready for the race. The multiple shift modes include full manual mode for using bump switch or paddle shifters.